CVE-2019-10906
Description
A flaw was found in Jinja. Python string formatting could allow an attacker to escape the sandbox. The highest threat from this vulnerability is to data confidentiality and integrity and system availability.
Statement
Red Hat Virtualization Management Appliance includes python-jinja2 as a dependency of ovirt-engine-backend, which only uses it with controlled format strings that are not exploitable. Red Hat Satellite 6 will receive fixes through the underlying Red Hat Enterprise Linux, so it won't issue updates to its own affected package.
This issue does not affect versions of python-jinja2 as shipped with:
- Red Hat Enterprise Linux 6, and 7 as python2 does not support str.format_map.
- Red Hat Update Infrastructure as it does not use the Sandbox feature, nor does it allow untrusted jinja2 templates.
- Red Hat Ceph Storage 2, 3 and Red Hat Gluster Storage 3 as python2 does not support str.format_map.
- Red Hat OpenStack Platform 13 or 14 as python2 does not support str.format_map.
Mitigation
If you cannot upgrade python-Jinja2, you can override the `is_safe_attribute` method on the sandbox and explicitly disallow the `format_map` method on string objects.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9 | 8.6 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | None | N/A |
| Availability Impact | High | None | N/A |
Vector
Red Hat: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability,Other
Technical Impact: Execute Unauthorized Code or Commands; Alter Execution Logic; DoS: Crash, Exit, or Restart
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